package com.voicechat.firstmet.utils;

/**
 * Created by yinwei on 15-7-6.
 */

import android.graphics.Bitmap;
import android.os.Environment;
import android.os.StatFs;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * SD卡相关的辅助类
 */
public class SDCardUtils {
    private SDCardUtils() {
        /* cannot be instantiated */
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 判断SDCard是否可用
     *
     * @return
     */
    public static boolean isSDCardEnable() {
        return Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED);

    }

    /**
     * 获取SD卡路径
     *
     * @return
     */
    public static String getSDCardPath() {
        return Environment.getExternalStorageDirectory().getAbsolutePath()
                + File.separator;
    }

    /**
     * 获取SD卡的剩余容量 单位byte
     *
     * @return
     */
    public static long getSDCardAllSize() {
        if (isSDCardEnable()) {
            StatFs stat = new StatFs(getSDCardPath());
            // 获取空闲的数据块的数量
            long availableBlocks = (long) stat.getAvailableBlocks() - 4;
            // 获取单个数据块的大小（byte）
            long freeBlocks = stat.getAvailableBlocks();
            return freeBlocks * availableBlocks;
        }
        return 0;
    }

    /**
     * 获取指定路径所在空间的剩余可用容量字节数，单位byte
     *
     * @param filePath
     * @return 容量字节 SDCard可用空间，内部存储可用空间
     */
    public static long getFreeBytes(String filePath) {
        // 如果是sd卡的下的路径，则获取sd卡可用容量
        if (filePath.startsWith(getSDCardPath())) {
            filePath = getSDCardPath();
        } else {// 如果是内部存储的路径，则获取内存存储的可用容量
            filePath = Environment.getDataDirectory().getAbsolutePath();
        }
        StatFs stat = new StatFs(filePath);
        long availableBlocks = (long) stat.getAvailableBlocks() - 4;
        return stat.getBlockSize() * availableBlocks;
    }

    /**
     * 获取系统存储路径
     *
     * @return
     */
    public static String getRootDirectoryPath() {
        return Environment.getRootDirectory().getAbsolutePath();
    }


    /***
     * 创建文件
     * @param filePath
     * @param fileName
     * @return
     */
    public static File makeFilePath(String filePath, String fileName) {
        File file = null;
        makeRootDirectory(filePath);
        try {
            file = new File(filePath + fileName);
            if (!file.exists()) {
                file.createNewFile();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return file;
    }

    /***
     * 创建文件目录
     * @param filePath
     */
    public static void makeRootDirectory(String filePath) {
        File file = null;
        try {
            file = new File(filePath);
            if (!file.exists()) {
                file.mkdirs();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    /**
     * 存储到本地
     * @param bitName
     * @param mBitmap
     * @throws IOException
     */
    public static void saveMyBitmap(String path, String bitName, Bitmap mBitmap) {
        File f = new File(path);
        if(!f.exists())
            f.mkdirs();//如果没有这个文件夹的话，会报file not found错误
        f=new File(path+bitName);

        try {
            f.createNewFile();
            FileOutputStream out = new FileOutputStream(f);
            mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}

